Section insulator



April 18, 1933. F, L, w

SECTION INSULATOR Filed March 16, 1932 [RUBBER FIBER Inventor FRED L. WOLF Attorney I Fig. l*'s a side viewlin elevafiiofi offonei.

.26. ning member which Iel'nploy.

- 9 is a P' eWfi Fi i; Fig. 10 ls a section on h li FRED LQifioLi, oJs MANS FIEL IS, onimsismndn TO THE M V MANSFIELD, onIo,- A1coRPoRA1:1o 5 on mgsmrv and parts fo'rithe same The obj ecfiof my invent-ion found With-existingdevices?I My i nvehfiionresidesfinthe'hew'ehgl' hovel GOIIStIHCtIO'Il, 'c'ombinatlon and-relation of the.

elements hereineftef desefihedeijld fliown ill the drawing ac'cdmpahyipgthis spe cifieetiollgx vention.

Fig. "s a} side View in el'evatlon d in e re i'n ii R m mberf-eh 41 Fig. 7 is a; sjcle'view [of a met member." v e U :;'7 Fig. 8 ls an end View of ig. 7

lg. 11' is a section on Fig, 4.

, inyention' relates 'to improfize mentfs inf seetion ipsulators,,that is, a devlcea-as shown In Fig; 1 I' have shownflonly oi eenclof a section insulator; as-,the-lotheriendjis the Same as that shown in- Fig. 1 and the, inter- Vening member maywbeOf any l'engthEde-u siredm is to provide an insulator *with running? or bridging member of iris ulating material which hesfii fies as com ared with those'xipropertiejs now H 1 'w a id w th; v n g pe n cmg s which ha sF its lower surface in alighir lei it f r 60 Cpred 111 p he e l 'e iel 'eix member forming I a per l; t I

and 2lie i f nl l h i ill eeee f r t w: int; ee ee erilnp s i g em ei ey he in -llilll f he 1 .3 Th le r per i ie e'fii "bepjlfl medefhegyy' to withstand thewe'ap V enel n o.

a y p ei i gip ti nvlrwwch i n sponds i11 .heightand width withmhe 'Ifieih e end lite; th 'f e y wire of theseetio flinsqlatorl 11 ie z 96 Hold the members 14 ifl-p'o'sitiori onthe lapping relation with respect to the adjacent member 11 which has its adjacent faces21 beveled to correspond with the beveled faces on the member 14.

The members 11 are in electrical engagement with the holding members 2 but the members 14 are spaced and insulated from the adjacent holding member ll thu s form ing'all r gap between the adjacent members 11 and 14.7 I

Interposed betweenthe inner of the l a surface union which may be accomplished by coating the surface of the member 131 with a, material Which has astrong adhesion to the material of the member 13 and for the i rubber coating 22 and this material may be one of a number of rubber cements suit able for the material such as thermoprene or a heat plastic rubber isomer having aless unsaturation than rubber and which are well known in the rubber art. The member 13 may be composed ofafibre impregnated with synthetic resins which may have ,a strong aflinity for the rubber. The rubber coating 22 is vulcanized upon the surface of the member 13 between the parts 14 and is preferably of the nature of what is known as car springrubber or it may be a grade such as used in rubber tires and which istoughfbut somewhat yielding and possessing h gh wearing properties when subjected to the passing of the current collector thereacross.

,Bfy insulating the members from the members 11 arcing at the point of the members 14 adjacent that of the rubber 22 is either eliminated or reduced to a very small amount, hence there is very' little, if any, burning-of the rubber due to arcing,

A running or bridging member constructed as above described possesses very'long life A as compared with a runner composed of only wood'or fibre which warps or splits in avery short time. i I l fIn place of having the end face of the member, 14: beveled in two directions the same overl'appingresults may be secured by having the end face a single obliquely disposed surface and having the adjacent surface of the member 11 beveled in like manner.

I prefer'tomake the member13 of a stiff or reasonably stiff materialwhich has very little bending property as-it will then act as a support or brace for the more resilient de-. formable or bendable rubber member 22. If

the runner was made entirely of a resilient rubber and mounted to the lower face of the member 1 it would be very likely to bend sideways with the passage of the current collector and possibly throw the collector from its position.

Therewill be; other modifications which will suggest themselves to those skilled in the art but I wish to be limited onlyby my "claims. a .3

I claim 1 U 1. A trolley wire section insulator comprising an elongated insulating bar having a conductor holder at each end, a runner holding member associated with each conductor holder, an insulated runner positioned between the runner holding members and comprising an elongated fiber memberhaving its ends exposed for attachment to the runner holding members on the insulator, metal members embracing the fiber member adjacent its ends adj acent tobut spaced from the adjacent holding member, the end of the metal embracing member being beveled and the adjacent,face-of-adjacent holding meme,

ber being correspondingly beveled and the said beveled faces overlapping and; a covering of resilient soft vulcanized rubber extending along the surfaces of the fiber member between (the said metal members.

bination an insulating bar having 1'3, conductor holder at each end ofthe bar and a runner holder detachably secured to each conductor holder at the inner end. thereof, an

bers and forming a running surface for a current collector. 1

3. A section insulator comprising in com bination an insulating bar having a conductor holder secured to each end of the bar and a runner holder secured to each conductor holder at the inner1endthereof,'an insulating; runner extending between the runner holders and detachably secured thereto comprising an elongated member of stiff insulating material a metalli'c member secured-- to each end of the elongated member adjacent to but not at the end of the member, and alayer of deformable rubber secured to the sides: of

the elongated member between the metallic members and the lower surface acting as a. running surface for apassingcurrent col lector. I I

4. A section. insulator comprising incom- I 2. A section insulator comprising incomsulating material having its endsheld by the runner holding members and a coating ofdeformable rubber extendingalong the side and bottom surfaces of the elongated member and secured to the said member. a

5. An article of manufacture'comprising an elongated insulating member. of fiber, a U-shaped metal member applied to the sides and bottom of the'fiber 'm ember adjacent to each end of the fiber member With the ends of the fiber member projecting longitudinally p from the U-shaped members, means, to se cure the U-shaped members to thefiber meme her and a covering of deformable rubber extending between the U-shaped members along the sides and bottom surfaces of the fiber members and having a surface union therewith and in addition mechanically inter-f locked with the fiber. member, the outeren'd faces of the U-shaped members being beveled transversely to the longitudinal axis of the runner. a a n 6. A runner for a section insulator comprising an elongated member of fiber, U- shaped metal memberspositioned adjacent each end of the fiber member and secured thereto and a layer of. deformable vulcanized rubber extending alongfthe fiber member between the U-shaped members and having its lower surface adapted to contact with a moving current collector, the rubber layer being secured to the fiber'member; a

7 A runner for a sectioninsulator comprising a stiff elongated member of insulating material, metal members secured to the ends of the elongated member a distance back from the ends of the elongated member, the

side and bottom faces of the elongated member between the metal members having layer of deformable rubber vulcanized upon the elongated member and having a surface union therewith.

8. A runner for a section insulator comprising a stiff elongated member of insulating material, metal members secured to the ends of the elongated member a distance back from the ends ofthe elongated member, the

side and bottom faces of the elongated member between the metal members having a layer of deformable rubber vulcanized upon the elongated member andhaving a surface union therewith, the rubber layer on the bottom surface of the elongated member having a greater thickness than that on the side faces. I i v 9. A runner for a sectlon lnsulator com prising a stiff elongated central member of insulatingwmaterial, spaced metalfiinembers secured. toethe icentral member at 'its ends, the por ionllof the wcentnali member 1 between, the

metal; members being enclosed :in a rubbercasingifwhioh haskar isiirfac'e .union with .1 a v sides of the central memberi 111 .w 10; -=ru'nner for 'sai'section insulator ctomprising; a stiff" elongatedfcentral ImemberEof insulating 3material;,i: spaced; metal a members secured to the central member at its ends; the

portion of the central'member i between: the metal members. being enclosed-w in? a rubber casing which has a "surface union with the.

sides of i the central "member, ;the; ends of the central member 1p ojectingibeyond the metal members in a longitudi-nal direction. a,

11 ArunnerforPa section insulator comprifs" stiff .e1ongated,central member xof insul ing material, spaced metal members secured tothe central memben at its ends, the, portion of the central'member?between the metal members? being enclosed in aga rubber casing which has a {surfaceunionl withflthe sides of the central; member, the endifaces-of the metal members being,obliquelyndisposed longitudinalaxisof thementral mem to the her. a

v A runner-J; for a section; insulatorlicon -hf prismgaistif'f elongated;central membenof insulating material; spaced meta1;;members secured to the-Z central jmember g deformable rubber interposed between the iinner if ace's' of a the metalmembers and secured l to the, side faces of the central member and-enclosing h l wer el fw ea en a :m m ni nd means for securing the runner inpositi'on the section insulator,

13. A runner for. a section v insulator com prising-Van elongated rubber member fhalving side and bottom-Walls, the ilatterthicker; than the K former, the rubber member, formed of deformable vulcanizedgubber; an} elongated 1 member associated with the rubber member the ends of the rubber' member.

prising an; elongatedrubber member for neclito prevent its: deformationandrfthe enfdsoof; i the: saidelongated member -projecting beyond of deformable vulcanized rubber andan elongated member associated with the I'llb-j em r pr ve t s. def a o a. a

partly enclosed-by thfij' f i bbe i member. a

f 15. A runner forasect'ion insulator coins P l ngY nie1ong T bbe mem ikformed of deformable vulcanizedrubber andanelongateds'member, associated with; a the; i ubber a em r p re t its" deformat m he ru ber, member beingvulcanized to'andq having,

sur ace am wi h t e. ai e ongate member;

eda mbe a s d wit athe a member; to prevent jjijts deformation, the rub-i ber member being vulcanized to and having a surface union with thesaid elongated mem-- ber and metallic membersiat each end of the rubber members and having its side and v bottom surfaces in alignment with those of the rubber member; V

17. A section insulator comprising in combination an insulating'bar having a conductor holder at each end and a portion of the Y holders extending horizontally and projecting longitudinally from the ends of the bar I and positioned below the lower surface of the bar and having the lower surfaces in alignment, a runner extending between the I5 conductor holders and positioned below the bar and havingits lower surface in align-- ment with that of the projecting portion of the conductor holders, the runner consistingof an elongated memberof deformable rubber and a stiffening member associated therewith to resist deformation of the rubber member and a metallic member at each end of the rubber'member and means to secureeach end of the runner in position between the conductor holders.

' 18. A runner for a section insulator comprising an elongated rubber member formed of deformable rubber, an elongated member associated with the rubber member to prevent its deformation and partly enclosed by the rubber member, a metal member mounted on the elongated member at each end of the rubber member. e

19. A runner for a section insulator comprising an elongated rubber member formed of vulcanized rubber, an elongated member of insulating material associated with the rubber member to prevent its bending and projecting from each end of the rubber member and in alignment therewith, ametal arcing member mounted on the elongated insulating member at each end of the rubber member and a metalsupporting member removably mounted on each end of the elongated insulating member to secure the elongated member in position on the section insulator.

20. A section insulator comprising in combination an insulating bar, a metallic end member secured to each end of the bar and spaced apart and having aligned lower edges, a detachable member secured to each end member to receive the trolley wire and means to secure the wire in place, a bridging member extending between the inner ends of the end members and comprising a rubber coating having its lower edge aligned with that of each end member and an elongated insulating-member enclosed along its sides by the rubber coating whereby the bridging mem ber is supported and metallic membersmountedon the elongated member adjacent,

the rubber member but spaced fromthe end members.

" In testimonywhereof I afiix' my signature.

" a FRED L.. WOLF. 

